.bg{
    border-top: 1px solid transparent;
    height: 600px;
    background: url(../images/zhu1.jpg) no-repeat;
    background-size: 1200px 600px;
}
.hn_and_qf{
    margin: 75px auto;   
    border-top: 1px solid transparent;
    width: 900px;
    height: 500px;
    background-color: white;
}
.hn_and_qf h2{
    font-size: 20px;
    margin: 25px 0 15px 0;
    text-align: center;
}
.hn_and_qf p{
    line-height: 30px;
    padding: 0 50px;
}
.pic{
    color: white;
    border-top: 1px solid transparent;
    margin: 0 auto;
    width: 800px;
    height: 230px;
    background: url(../images/500406090.jpg) no-repeat;
    background-size: 800px 230px;
}
.pic li{
    margin: 20px 0 0 30px;
}
.pic li h3{
    margin-bottom: 5px;
}